Frequencies for versionnum variable in network2015 dataset :

    Version |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         46        3.15        3.15
          2 |        229       15.70       18.85
          3 |        172       11.79       30.64
          4 |        191       13.09       43.73
          5 |        145        9.94       53.67
          6 |        103        7.06       60.73
          7 |        125        8.57       69.29
          8 |        125        8.57       77.86
          9 |         77        5.28       83.14
         10 |         62        4.25       87.39
         11 |         42        2.88       90.27
         12 |         33        2.26       92.53
         13 |         17        1.17       93.69
         14 |         23        1.58       95.27
         15 |          6        0.41       95.68
         16 |         10        0.69       96.37
         17 |          9        0.62       96.98
         18 |         15        1.03       98.01
         19 |         14        0.96       98.97
         20 |         13        0.89       99.86
         21 |          2        0.14      100.00
------------+-----------------------------------
      Total |      1,459      100.00

by Jean Roth , jroth@nber.org , 9 Dec 2017